diff --git a/packages/embeds/js/src/components/Bot.tsx b/packages/embeds/js/src/components/Bot.tsx
index a6a1a0ce4..0ca06ed85 100644
--- a/packages/embeds/js/src/components/Bot.tsx
+++ b/packages/embeds/js/src/components/Bot.tsx
@@ -60,11 +60,17 @@ export const Bot = (props: BotProps & { class?: string }) => {
       },
     })
     if (error && 'code' in error && typeof error.code === 'string') {
+      if (typeof props.typebot !== 'string' || (props.isPreview ?? false)) {
+        setError(
+          new Error('An error occurred while loading the bot.', {
+            cause: error.message,
+          })
+        )
+      }
       if (['BAD_REQUEST', 'FORBIDDEN'].includes(error.code))
         setError(new Error('This bot is now closed.'))
       if (error.code === 'NOT_FOUND')
         setError(new Error("The bot you're looking for doesn't exist."))
-      return
     }
 
     if (!data) return setError(new Error("Error! Couldn't initiate the chat."))
diff --git a/packages/embeds/js/src/components/ConversationContainer/ChatChunk.tsx b/packages/embeds/js/src/components/ConversationContainer/ChatChunk.tsx
index ddf71d5d1..0096bd3d4 100644
--- a/packages/embeds/js/src/components/ConversationContainer/ChatChunk.tsx
+++ b/packages/embeds/js/src/components/ConversationContainer/ChatChunk.tsx
@@ -12,6 +12,7 @@ type Props = Pick<ChatReply, 'messages' | 'input'> & {
   inputIndex: number
   context: BotContext
   isLoadingBubbleDisplayed: boolean
+  hasError: boolean
   onNewBubbleDisplayed: (blockId: string) => Promise<void>
   onScrollToBottom: () => void
   onSubmit: (input: string) => void
@@ -90,6 +91,7 @@ export const ChatChunk = (props: Props) => {
             isInputPrefillEnabled={
               props.settings.general.isInputPrefillEnabled ?? true
             }
+            hasError={props.hasError}
           />
         )}
       </div>
diff --git a/packages/embeds/js/src/components/ConversationContainer/ConversationContainer.tsx b/packages/embeds/js/src/components/ConversationContainer/ConversationContainer.tsx
index aa341feaa..43851e984 100644
--- a/packages/embeds/js/src/components/ConversationContainer/ConversationContainer.tsx
+++ b/packages/embeds/js/src/components/ConversationContainer/ConversationContainer.tsx
@@ -59,6 +59,7 @@ export const ConversationContainer = (props: Props) => {
   const [theme, setTheme] = createSignal(props.initialChatReply.typebot.theme)
   const [isSending, setIsSending] = createSignal(false)
   const [blockedPopupUrl, setBlockedPopupUrl] = createSignal<string>()
+  const [hasError, setHasError] = createSignal(false)
 
   onMount(() => {
     ;(async () => {
@@ -82,19 +83,30 @@ export const ConversationContainer = (props: Props) => {
   })
 
   const sendMessage = async (message: string | undefined) => {
+    setHasError(false)
     const currentBlockId = [...chatChunks()].pop()?.input?.id
     if (currentBlockId && props.onAnswer && message)
       props.onAnswer({ message, blockId: currentBlockId })
     const longRequest = setTimeout(() => {
       setIsSending(true)
     }, 1000)
-    const data = await sendMessageQuery({
+    const { data, error } = await sendMessageQuery({
       apiHost: props.context.apiHost,
       sessionId: props.initialChatReply.sessionId,
       message,
     })
     clearTimeout(longRequest)
     setIsSending(false)
+    if (error) {
+      setHasError(true)
+      props.onNewLogs?.([
+        {
+          description: 'Error while sending message',
+          details: error,
+          status: 'error',
+        },
+      ])
+    }
     if (!data) return
     if (data.logs) props.onNewLogs?.(data.logs)
     if (data.dynamicTheme) setDynamicTheme(data.dynamicTheme)
@@ -174,6 +186,7 @@ export const ConversationContainer = (props: Props) => {
             onScrollToBottom={autoScrollToBottom}
             onSkip={handleSkip}
             context={props.context}
+            hasError={hasError() && index() === chatChunks().length - 1}
           />
         )}
       </For>
diff --git a/packages/embeds/js/src/components/ErrorMessage.tsx b/packages/embeds/js/src/components/ErrorMessage.tsx
index 5b9235442..6399bbc54 100644
--- a/packages/embeds/js/src/components/ErrorMessage.tsx
+++ b/packages/embeds/js/src/components/ErrorMessage.tsx
@@ -5,6 +5,7 @@ export const ErrorMessage = (props: Props) => {
   return (
     <div class="h-full flex justify-center items-center flex-col">
       <p class="text-2xl text-center">{props.error.message}</p>
+      <p class="text-center">{props.error.cause as string}</p>
     </div>
   )
 }
diff --git a/packages/embeds/js/src/components/InputChatBlock.tsx b/packages/embeds/js/src/components/InputChatBlock.tsx
index 50b1eb9c4..72e5ff11d 100644
--- a/packages/embeds/js/src/components/InputChatBlock.tsx
+++ b/packages/embeds/js/src/components/InputChatBlock.tsx
@@ -37,6 +37,7 @@ type Props = {
   inputIndex: number
   context: BotContext
   isInputPrefillEnabled: boolean
+  hasError: boolean
   onSubmit: (answer: string) => void
   onSkip: () => void
 }
@@ -56,16 +57,14 @@ export const InputChatBlock = (props: Props) => {
 
   return (
     <Switch>
-      <Match when={answer()} keyed>
-        {(answer) => (
-          <GuestBubble
-            message={answer}
-            showAvatar={props.guestAvatar?.isEnabled ?? false}
-            avatarSrc={props.guestAvatar?.url && props.guestAvatar.url}
-          />
-        )}
+      <Match when={answer() && !props.hasError}>
+        <GuestBubble
+          message={answer() as string}
+          showAvatar={props.guestAvatar?.isEnabled ?? false}
+          avatarSrc={props.guestAvatar?.url && props.guestAvatar.url}
+        />
       </Match>
-      <Match when={isNotDefined(answer())}>
+      <Match when={isNotDefined(answer()) || props.hasError}>
         <div
           class="flex justify-end animate-fade-in"
           data-blockid={props.block.id}
diff --git a/packages/embeds/js/src/queries/sendMessageQuery.ts b/packages/embeds/js/src/queries/sendMessageQuery.ts
index c56d4af24..0fc0fbfa3 100644
--- a/packages/embeds/js/src/queries/sendMessageQuery.ts
+++ b/packages/embeds/js/src/queries/sendMessageQuery.ts
@@ -2,15 +2,12 @@ import { guessApiHost } from '@/utils/guessApiHost'
 import type { ChatReply, SendMessageInput } from '@typebot.io/schemas'
 import { isNotEmpty, sendRequest } from '@typebot.io/lib'
 
-export async function sendMessageQuery({
+export const sendMessageQuery = ({
   apiHost,
   ...body
-}: SendMessageInput & { apiHost?: string }) {
-  const response = await sendRequest<ChatReply>({
+}: SendMessageInput & { apiHost?: string }) =>
+  sendRequest<ChatReply>({
     method: 'POST',
     url: `${isNotEmpty(apiHost) ? apiHost : guessApiHost()}/api/v1/sendMessage`,
     body,
   })
-
-  return response.data
-}
diff --git a/packages/embeds/js/src/utils/guessApiHost.ts b/packages/embeds/js/src/utils/guessApiHost.ts
index 930ab5b1f..df3a8a7d8 100644
--- a/packages/embeds/js/src/utils/guessApiHost.ts
+++ b/packages/embeds/js/src/utils/guessApiHost.ts
@@ -3,4 +3,6 @@ import { env } from '@typebot.io/lib'
 const cloudViewerUrl = 'https://viewer.typebot.io'
 
 export const guessApiHost = () =>
-  env('VIEWER_URL')?.split(',')[0] ?? cloudViewerUrl
+  env('VIEWER_INTERNAL_URL') ??
+  env('VIEWER_URL')?.split(',')[0] ??
+  cloudViewerUrl